Finance & Investment
Investment Calculator
Investment — it grows the principal with the compound-interest formula A = P(1 + r/n)^(nt), where n is the number of compounding periods per year. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Investment Calculator turns your initial investment, expected annual return, holding period and compounding frequency into the maturity value and interest earned using A = P(1 + r/n)^(nt). The maths runs locally, so nothing you enter leaves the page.
Estimate only. Not financial, investment, tax, retirement, pension, crypto, or legal advice. Returns, rates, fees, taxes, inflation, market prices, product rules, and government schemes can change. Verify with official sources or a qualified professional before relying on results.
About this calculator
It grows the principal with the compound-interest formula A = P(1 + r/n)^(nt), where n is the number of compounding periods per year. That is the whole of the calculation — the mistakes happen in the inputs. It matters any time money changes value over time — savings, loans, investments, prices and pay all reduce to these relationships. Worked example: Investing 100,000 at 10% compounded annually for 5 years grows to 100,000 × 1.10 5 = 161,051 . Use the calculator with your own figures; it runs entirely on your device.
How to use
- Enter the amount of your initial investment.
- Type the investment's expected annual return as a percentage.
- Set the holding period in years and pick a compounding frequency.
- Tap Calculate to project the investment value and the total gain.
Why use the Investment Calculator
Instant
Every figure is computed on your device the moment you tap Calculate.
Private
Your numbers stay in your browser; nothing is sent to a server or saved.
Free
No signup, no paywall, and no ads placed inside your results.
Works offline
Once the page has loaded it keeps working even on a weak connection.
Mobile-first
Laid out for phones and tablets just as much as for desktops.
Honest estimates
Uses simplified formulas for educational estimates; actual results vary with taxes, fees, compounding rules, market returns, scheme rules, inflation, and local regulations.
Common uses
Use it for principal-and-interest growth
Use it when comparing simple and compound
Use it for growth with reinvested interest
Use it when teaching compound interest
Use it for understanding compounding
Use it for a quick compound-interest check
Technical notes
Investment Calculator grows the principal with the compound-interest formula A = P(1 + r/n)^(nt), where n is the number of compounding periods per year.
Figures assume the rate and amounts you enter stay fixed and exclude fees, taxes and charges unless a field asks for them.
Because it runs locally, results appear instantly with no server round-trip.
Worked example
Investing 100,000 at 10% compounded annually for 5 years grows to 100,000 × 1.105 = 161,051.
FAQ
Is the expected return guaranteed?
No. Market returns vary year to year; this projection assumes a constant rate purely for planning and does not predict actual performance.
Does the Investment Calculator send my data to a server?
No. The Investment Calculator runs entirely in your browser with JavaScript; the values you enter never leave your device and nothing is uploaded or saved.
Should I use annual or monthly compounding for investments?
For market funds, annual compounding is a reasonable simplification; choose monthly only if your instrument explicitly credits returns monthly.
How is this different from the SIP calculator?
This grows a single lump-sum amount, whereas the SIP calculator grows a fixed amount invested every month over the term.